American actor Tyler Collins, who starred in director John McPhail's previous film, Where Do We Go From Here? (2015), has a brief, uncredited non-speaking role as a zombie during the scene when the undead attack the bowling alley.

Paul Kaye, who plays 'Headmaster Savage' is killed by the zombies near the end of the film. Kaye is most famous for his portrayal of 'Thoros Of Myr' on "Game Of Thrones", a character who is also killed by a zombie... albeit a zombie bear.